报告题目：Floquet engineering of quantum materials: from semiconducting black phosphorus to graphene

报 告 人: 周树云 教授，清华大学物理系

报告时间：2026年5月14日（周四） 14：30-15：30

报告地点：物理楼天行报告厅(W101)

内容摘要：Time-periodic light-field can dress the electronic states of quantum materials, providing a fascinating controlling knob for transient modifications of the electronic structure with versatile light-induced emergent phenomena [1]. In this talk, I will present our recent experimental progress on the Floquet engineering of quantum materials using time- and angle-resolved photoemission spectroscopy (TrARPES). In particular, experimental progress on the Floquet engineering of semiconducting black phosphorus [2-4], topological insulator [5], graphene [6] and graphite [7] will be presented. Experimental insights on Floquet engineering and light-matter interactions in quantum materials will also be discussed.

References

1.“Light-induced emergent phenomena in 2D materials and topological materials”, Nat. Rev. Phys. 4, 33 (2022)

2.“Pseudospin-selective Floquet band engineering in black phosphorus”, Nature 614, 75 (2023)

3.“Floquet engineering of black phosphorus upon below-gap pumping”, Phys. Rev. Lett. 131, 116401 (2023)

4.“Manipulating the symmetry of photon-dressed electronic states”, Nat. Commun. 15, 10533 (2024)

5.“Light-field dressing of transient photo-excited states above the Fermi energy”, Phys. Rev. Lett. 134, 146401 (2025)

6.“Observation of Floquet-induced gap in graphene”, Nat. Mater. (2026) https://www.nature.com/articles/s41563-026-02549-y

7.“Robust Floquet-induced gap in irradiated graphite”, Chin. Phys. Lett. 43, 050705 (2026)

报告人简介：Shuyun Zhou is a professor of Physics at Tsinghua University. Her research focuses on the electronic structure and ultrafast dynamics of low-dimensional materials and heterostructures, in particular Floquet engineering of quantum material using ultrafast lasers. Her recognitions include the Xplore Prize, Huang Kun Physics Prize, Sir Martin Wood low temperature prize, L’Oreal-UNESCO Award for Women in Science, China.